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Page 1: Raise Boring A

Raise boring equipment

Page 2: Raise Boring A

� • raise boring equipment

Flexible spacing

Optimum button design

Extendable reaming heads

All components are bolted together

Segmented reaming headsSpecial gauge saddle system

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raise boring equipment • �

Segmented reaming heads Reaming heads for any raise boring project

The Sandvik Raise Boring System includes a wide range of reaming heads in a number of

types, sizes and configurations for boring holes from 0.6 to 6 meters in diameter. Designed

for optimum performance in any type of project, the equipment is built according to certain

fundamental principles.

All basic components are bolted to each other, which enables fast and easy mounting,

assembly and servicing. Since the stem is bolted to the base-head, different sizes of stem

can be fitted to suit different sizes of pilot hole. The saddles, too, are bolted to the head.

They are therefore easy to re-position, which gives maximum flexibility.

The Sandvik system is based on standard components, which contributes greatly to its

flexibility and high availability. All heads have a flat cutting profile which rotates smoothly

and with optimum thrust utilisation.

Sandvik reaming heads are easy to adapt to different rock conditions by re-arranging

the cutters. The effect is to change the spacing between the rows of cemented-carbide but-

tons that break the rock. To enable row spacing to be varied, only two types of cutter are

needed on any one reaming head. Placing one or the other type of cutter in different

positions on the head gives either wide or narrow button-row spacing. The unique

design of Sandvik cemented-carbide buttons ensures long service life and the highest

possible rate of penetration.

A special gauge saddle system has been developed with the option to reduce the reamer

diameter in two steps simply by changing to diffrent types of saddle. This option can be

used in any project with heavy gauge wear and it makes it easier to reach the rock face if the

reamer is lowered for any service.

Larger diameter Sandvik reaming heads are available in segmented versions, which

enable transport dimensions and weight to be reduced for projects in which there are

size or weight restrictions.

We also offer a wide range of extendable reaming heads, which can be built to different

diameters by fixing segments of different types and sizes to the base-head.

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� • raise boring equipment

Convential raise boring

Down boring Blind hole boring

Pilot hole boring

Horisontal boring

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raise boring equipment • �

Pilot drillingConventional raise boring begins with the drilling of a pilot hole. It is drilled using a roller bit with sealed bearings, together with hollow drill pipes 1.5 m in length with an international standard thread for high–torque applications. The cuttings are removed from the pilot hole with the aid of water flushing. Introduced through the center of the drill string, the water flows out of the drill bit and up through the annulus between the drill pipes and the hole wall. If required, the pilot drilling can be controlled by using a directional drilling system.

Raise boringWhen the pilot hole breaks through into the lower level, the roller bit is removed and replaced with a reaming head. The reamer is rotated and pulled back toward the drilling unit. The cuttings fall by gravity into the chamber at the bottom of the hole, where they are mucked out using a LHD-type loader. Raises up to 6 m in diameter and up to 1000 m in length are not uncommon. The raise-boring method is used to produce ventilation shafts, ore passes, manways, penstocks etc.

Blind boringWhen a raise is required but there is no access to the upper level, it has to be bored blind from below, usually without a pre-drilled pilot hole. A special type of head is required for blind boring. It drills the pilot hole and reams out the raise at the same time. The head is rotated and pushed upward. The cuttings fall out of the hole by gravity. Normal blind raise diameters are from 0.6 to 1.8 m. Since the drill string is under compression during blind boring, special large-diameter stabilizers are needed to support the drill string. The blind-boring method is used to produce so-called slot raises, ore passes and manways.

Horizontal boringHorizontal boring is an excellent method in urban construction projects where drilling and blasting is restricted or forbidden and tunnel boring machines (TBMs) are too bulky. First, a horizontal pilot hole is drilled, with the aid of a directional drilling system if necessary. When the pilot bit breaks through, it is removed and replaced with a reaming head. Because the hole is horizontal, the reamer must be equipped with a special cuttings removal system. Typical diameters for horizontal reaming are from 0.6 to 4.5 m. The method is used to drill tunnels for cables, escape routes, sewage etc without disturbing the environment unduly. Horizontal boring requires good rock stability.

Down boring with a pre-drilled pilot holeIn mines, large fill-holes between 0.6 and 1.8 m in diameter can be bored into stopes using reaming equipment, provided that a pilot hole can be pre-drilled into the stope. The pilot bit and drill string are then removed and a reamer fitted. The reamer is pushed and rotated downward, guided by a nosepiece that follows the pilot hole. The cuttings fall by gravity down through the pilot hole. Since the drill string is under compression during down boring, special large-diameter stabilizers are needed to support the drill string.

Raise boring methods

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� • raise boring equipment

Segmented reaming head

Integral reaming head

Extendable reaming heads

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raise boring equipment • �

Sandvik RS510 integral reaming heads

A Sandvik RS510 integral reaming head is the first choice for any raise boring project in

which there are no size or weight restrictions. The integral head is very strong and rigid. The

stem, saddles and cutters are bolted to the head and easy to service.

All Sandvik integral reaming heads have a flat cutting profile for smooth rotation and

low torque demands. There are various stem-fit and saddle options. Stem sizes from Ø228 to

381 mm (9-15”) can be used.

Sandvik RS520 segmented reaming heads

Sandvik RS520 segmented reaming heads should be chosen for projects in which there

are restrictions on transport weights or dimensions. The segmented design comprises a

base-head and two removable segments. This enables the reamer to be transported to the

collaring site via small cages and narrow drifts. The segments are then fixed to the base-head

using standard tools.

Sandvik segmented reaming heads, too, have a flat cutting profile for optimum

performance. All components such as the stem, segments, saddles and cutters are attached

by bolts. This makes them very versatile and enables quick and easy servicing. There are various

stem-fit and saddle options. Stem sizes from Ø228 mm to 349 mm (9-13 ¾”) can be used.

Sandvik RS530 extendable reaming heads

Sandvik RS530 extendable reaming heads consist of a base-head to which four or six

segments can be fitted. That means the reaming head can be built to different diameters.

Sandvik extendable reaming heads are therefore a good option for any project in which

there are both size and/or weight restrictions and high demands for hole-size flexibility.

Segmentation allows the reamer to be transported to the collaring site via small cages and

narrow drifts. The segments are then fixed to the base-head using standard tools.

Sandvik extendable reaming heads, too, have a flat cutting profile for optimum

performance. All components such as the stem, segments, saddles and cutters are attached by

bolts. This makes them very versatile and enables quick and easy servicing. Different centre

bores (stem-fits) and saddle options are available.

Stem sizes from Ø280 to 381mm (11-15”) can be used. The RS530 system permits raises

of several different diameters to be bored with one and the same reaming head, thus reducing

capital cost and keeping inventories to a minimum.

Our types of reaming heads

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� • raise boring equipment

Horizontal reaming head with scraper blades

Blind boring head Cutter

Saddles

Stem

Pilot bits

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raise boring equipment • �

In addition to the wide range of standard reaming heads for conventional raise boring,

Sandvik offers to tailor-make reaming systems for any application that requires special design

features. Examples include:

• Blind-hole boring systems with water-flushing, different drill-pipe to reamer connections

and different stems to fit different sizes of pilot hole

• Down-boring systems with V-shaped reamers for improved cuttings removal while

following a pre-drilled pilot hole, as well as different drill-pipe to reamer connections

and removable wear-pad stem sleeves

• Horizontal-boring systems with scrapers and water flushing for efficient cuttings removal

• Underwater-reaming systems with pressure-compensated cutters and specially segmented

components that are easy to handle

As with all Sandvik reaming heads, our tailored systems are designed and built in accord-

ance with proven principles using:

• Bolted components for fast, easy handling and quick servicing

• Standard components for high availability, good flexibility and low inventories

• Flat cutting profiles for smooth rotation, optimum thrust utilization and performance

Please consult your nearest Sandvik raise-boring specialist if your project needs a tailored

solution.

Components and Spare parts

Key components for all standard reaming heads are always available from stock. Examples of

standard-stock items include:

• Cutter types CMR 41 and CMR 52, which cover most applications

• Saddles for different positions and different types of reaming head

• Stems for different pilot-hole diameters with threads to fit any size of drill pipe

• Sealed bearing pilot bits featuring special designed gauge buttons in DP cemented carbide

for high gauge wear resistance and high performance

For more detailed information about components, spare parts and ordering numbers, please

see the Sandvik Raise Boring Heads – User Manual HR – 13121.

Tailor-made reaming heads and components for different applications

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10 • raise boring equipment

Technical specification

SANDVIK RS 510 Integral reaming headsIntegral Reaming Head with Ø340 mm centre bore (Stem f it)Part No incl saddles Type Diameter mm/inch No of Cutters Weight Kg *

7008-1310-30 CRH 3 1060/42 4 2 700

7008-1311-30 CRH 3 1084/43 4 2 700

7008-1314-30 CRH 4 1420/56 6 3 400

7008-1315-30 CRH 5 1524/60 8 4 250

7008-1018-30 CRH 6 1829/72 10 5 100

7008-1021-30 CRH 7 2134/84 12 5 900

7008-1024-30 CRH 8 2440/96 14 6 850

7008-1924-30 CRH 8D 2447/96 14 7 100

Integral Reaming Head with Ø360 mm centre bore (Stem f it)

7008-1324-30 CRH 8L 2440/96 14 7 300

7008-1027-30 CRH 9L 2749/108 14 8 150

7008-1931-30 CRH 10D 3094/122 16 10 550

Integral Reaming Head with Ø390 mm centre bore (Stem f it)

7008-1731-30 CRH 10D 3094/122 16 11 050

SANDVIK RS 520 Segmented reaming headsSegmented Reaming Head with Ø340 mm centre bore (Stem f it)Part No incl saddles Type Diameter mm/inch No of Cutters Weight Kg *

7008-1418-30 CRH 6S 1829/72 10 5 200

7008-1421-30 CRH 7S 2134/84 12 6 100

7008-1424-30 CRH 8S 2440/96 14 7 350

Segmented Reaming Head with Ø360 mm centre bore (Stem f it)

7008-1831-30 CRH 10SD 3094/122 16 10 750

SANDVIK RS 530 Extendable reaming headsExtendable Reaming Head with Ø340 mm centre bore (Stem f it)Base head No incl saddles Segment No incl saddles Type Diameter mm/inch Cutters Weight Kg *

7008-1318-30 2 X 7008-2101-30 CRH 6E 1829/72 10 5 700

7008-1318-30 * * 2 X 7008-2169-30 * * CRH 6E 2152/85 * * 10 * * 5 850

7008-1318-30 2 X 7008-2169-304 X 7008-2170-30

CRH 6E 2429/96 14 7 250

Extendable Reaming Head with Ø360 mm centre bore (Stem f it)

7008-1724-30 2 X 7008-2101-30 CRH 8ESP 2440/84 14 8 600

7008-1724-30 2 X 7008-2167-302 X 7008-2168-30

CRH 8ESP 2763/109 16 9 450

* = Total weight including head, stem, saddles and cutters

* = Total weight including head, stem, saddles and cutters

* = Total weight including head, stem, saddles and cutters

* * = Only possible to use two gauge cutters

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raise boring equipment • 11

Technical specification

SANDVIK RS 530 Extendable reaming headsExtendable Reaming Head with Ø360 mm centre bore (Stem f it)Base head No incl saddles Segment No incl saddles Type Diameter mm/inch Cutters Weight Kg *

7008-1631-32 2 X 7008-2134-30 CRH 10SE 3047/120 16 11 925

7008-1631-32 2 X 7008-2135-302 X 7008-2136-30

CRH 10SE 3372/133 18 14 075

7008-1631-32 2 X 7008-2135-302 X 7008-2136-302 X 7008-2138-30

CRH 10SE 3696/146 20 15 325

7008-1031-30 * * None CRH 10E 3130/123 16 11 500

7008-1031-32 * * 2 X 7008-2109-302 X 7008-2110-30

CRH 10E 3500/138 18 14 000

7008-1031-32 * * 2 X 7008-2109-302 X 7008-2110-302 X 7008-2111-30

CRH 10E 3824/151 20 15 250

7008-1440-32 * * * 2 X 7008-2109-302 X 7008-2110-30

CRH 10ED 3500/138 18 14 000

7008-1440-30 * * * 2 X 7008-2152-302 X 7008-2153-30

CRH 10ED 3687/145 20 15 050

7008-1440-32 * * * 2 X 7008-2109-302 X 7008-2110-302 X 7008-2111-30

CRH 10ED 3824/151 20 15 250

7008-1440-30 * * * 2 X 7008-2144-302 X 7008-2145-30

CRH 10ED 4042/159 22 16 850

Extendable Reaming Head with Ø390 mm centre bore (Stem f it)

7008-1338-30 2 X 7008-2150-302 X 7008-2164-30

CRH 12E 3534/139 18 22 510

7008-1338-30 2 X 7008-2150-302 X 7008-2151-30

CRH 12E 3840/151 20 25 150

7008-1338-30 2 X 7008-2161-302 X 7008-2162-30

CRH 12E 4146/163 22 26 670

7008-1338-30 2 X 7008-2148-302 X 7008-2149-30

CRH 12E 4500/177 24 28 000

7008-1338-30 2 X 7008-2146-302 X 7008-2147-30

CRH 12E 5000/197 26 30 550

7008-1338-30 2 X 7008-2159-302 X 7008-2160-30

CRH 12E 5100/201 26 30 550

7008-1338-30 2 X 7008-2154-302 X 7008-2155-30

CRH 12E 5520/217 30 36 600

7008-1338-30 2 X 7008-2156-302 X 7008-2158-30

CRH 12E 5876/231 32 38 450

* = Total weight including head, stem, saddles and cutters

* * = Part No 7008-1331-3X for reaming head with Ø390 mm centre bore (stem fit)

* * * = Part No 7008-1340-3X for reaming head with Ø390 mm centre bore (stem fit)

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Sandvik Mining and Construction. SE-811 81 Sandviken, Sweden. Phone +46 26 26 20 00 Fax +46 26 26 23 00 www.sandvik.comHR-12671a-ENG